Gyratory crusher-head



C B ANDREWS. syn-Mom cnusnan HEAD. APPLlCATlO-i FILED JAN. 23. 19l8.

Patented May 13, 1919.. Q

T ME '11 ""hmw .9

"UNITED STATES PATENT ornion CHARLES B. ANDREWS, or HIGH BRIDGE, new Jnnsny, ,ASSIGNOR T0 rAY on WHARTON IRON AND STEEL COMPANY, or men arren, NEW JnnsnY, l

CORIQBATION OF NEW JERSEY.

GYRATORY CRUSI-IER-I-IEAD.

Specification of Letters Patent.

Patented May 13-, 1919.

l Application filed January 23, 1918. Serial No. 213,286.

To all whom it may concern Be it known that I, CHARLES B. ANDnnws, United States citizen, residing in -I-I1gh Bridge, New Jersey, have invented the 'following described Improvements in Gyratory Crusher-Heads. s

The improvementconcerns the mounting of the mantlesqonthe cores and also of the cores on the shafts of rotary or gyratory crushing. mills, the object being to secure and maintain the mantle in a rigid relation 'to the shaft notwithstanding its wear and distortion or stretching under the strains of use. To this end. the invention consists in providing separate take-ups for core, and mantle and a special means of locking the one to the other which is unaffected by their relative positions and also in means for automatically taking up looseness of the mantle was and when it-develops in use, all

of these features serving independently and collectively to minimize the cost of main tenance and increase the efliciency of mills of this class as will hereafter be made apparent.

In the accompanying drawings: Figure 1 is an elevation of a crusher head partly in section and partly broken away;

Fig. 2 an end view of the same; Fig. 3 a radial section at the key; and Fig. 4: a perspective of a suitable form of The shaft 1 is slightly coned to receive the core 2 which is keyed or fitted non-rotatively thereon in any approved manner and pressed toward the larger diameter of the shaft by a ring nut 3 threaded on the shaft and abutting against the smaller end 4 of the core.

The ring nut 3 is locked to the shaft to prevent loosening in service, by a key 3* inserted in one of several key seats 3 provided for the purpose. coned to receive the internally coned mantle 5, and the latter is usually and preferably made of manganese steel or any tough metal specially suited to resist abrasion. In the present case it is cast with internally elevated grinding pads or surfaces 6, which are ground down to fit and form a bearing upon the external conical surface of the core, the intervening spaces between ads being filled in with molten zinc or ot er filling, according to the practice common in the art. The mantle is held non-rotatively to the core partly by its friction thereon, for which pur- The core is externally against its smaller end 8 and adapted to,

press it firmly toward the larger end of the core. This ring nut is threaded to the ring nut 3, being thus adjustable independently thereof, and a key 7 a is provided to prevent rotation thereon in service. Both nuts are threaded with the same direction of pitch, right-handed in the case shown in the drawings. The mantle is also secured against rotation upon the core by a special key, separately shownin Fig. 4, and which is provided with one part 9, adapted to occupy a square notch 10 formed in the small end of the core beneath the thrust face of the ring nut 3, and another part 11, adapted to occupy a notch 12 in the small end, of the mantle beneath the face of ring nut 7 The part 9 of the key, seated in the core, is desirably larger than'theipart 11 seated in themantle, sothat the key is thereby held against accidental dislodgment although it may "ibe otherwise secured or confined in position as While the key may be variously related to the other parts to perform the function stated, it is preferably arranged so that the surface of engagement between it and the mantle has an inclination to the direction of any rotary motion of the latter if any should take place and so as to produce a wedging action actingv on the mantle to force it into tighter engagement with the core. This effeet is produced by giving the key part 11 the triangular shape indicated in the drawings and correspondingly shaping the notch 12 with which it engages, which formation results in forcing or wedging the mantle longitudinally of the shaft and in the direction of the larger end of the core thus tightening the mantle if loose. It is preferred to have the wedging engagement just referred to occur between the mantle and the key part 11 as shown in the drawings but manifestly the wedging surfaces may be variously related to the mantle to give the same such rotation will be resisted not only 'by the 1 upon the inner ring nut 3. Thus it will be seen that the entire head is adapted to remain tight for indefinite periods and that thering nut will require to be tightened only at infrequent intervals. It is obvious that the function of the key and 0f the wedging surfaces are independent of the manner of attachment of the core to the shaft, which latter may therefore be made integral with the core in certain forms of the invention, and likewise that various ad- .ditions, subtractions, substitutions, reversals and modifications may be resorted to Within the invention and Without sacrificing the benefits of the principles thereof which have nowbeen explained and which are more particularlyidentified in the following clalms.

Claims. a

1. A crusher head mounting comprising a tapered seat, a mantle thereon, means engag- Gopiee of this patent may be obtained for ing the end of the mantle to force it on the seat and a key interlockin the mantle and seat and removalbly confinei i in place by said means.

2. In a crusher head mounting, a tapered core carrying a tapered mantle, separate ,screw thread rings for forcing each in an endwise direction and a removable key engaging notches in the mantle and core respectively.

3. A crusher head mounting comprising a tapered core and mantle, a separate ring nut for forcing each in an endwise direction and,

a removable key confined in registering notches in sald core and mantle.

4; A crusher head comprlslng a crusher shaft having a tapered seat for an externally I tapered core, an internally tapered mantle seated on the core and ring nuts having the same direction of pitch for separately forcing the core and mantle toward the larger ends of their respective seats. i i

5. A crusher head mounting comprising an internally tapered mantle keyed to a tapered mantle seat and a ring nut having a thrust face proximate to thrust surfaces on the mantle and key, respectively, and adapted to engage either. I

In testimony whereof, I have signed this specification. a CHARLES B. ANDREWS.-

five cents each, by addressing the Commissioner or intents,

Washington, 20.0." g I 

